This patch adds APIs to access(open / close) and to resize boot partiton of EMMC.
Signed-off-by: Amar amarendra.xt@samsung.com --- Changes since V1: New patch.
Changes since V2: 1)Updation of commit message and resubmition of proper patch set.
Changes since V3: No change.
Changes since V4: 1)Replaced the functions mmc_boot_open() & mmc_boot_close() with a single function mmc_boot_part_access().
Changes since V5: 1)Updated in response to review comments.
Changes since V6: 1)Added spaces around << operator, in response to review comments.
Changes since V7: 1)In the file drivers/mmc/mmc.c, the piece of code involved in open/close and resize of EMMC boot partition has been made conditional and is enabled only if the macro CONFIG_SUPPORT_EMMC_BOOT is defined.
drivers/mmc/mmc.c | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/mmc.h | 26 +++++++++++ 2 files changed, 160 insertions(+)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index d732581..a6a04e6 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1352,3 +1352,137 @@ int mmc_initialize(bd_t *bis)
return 0; } + +#ifdef CONFIG_SUPPORT_EMMC_BOOT +/* + * This function changes the size of boot partition and the size of rpmb + * partition present on EMMC devices. + * + * Input Parameters: + * struct *mmc: pointer for the mmc device strcuture + * bootsize: size of boot partition + * rpmbsize: size of rpmb partition + * + * Returns 0 on success. + */ + +int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize, + unsigned long rpmbsize) +{ + int err; + struct mmc_cmd cmd; + + /* Only use this command for raw EMMC moviNAND. Enter backdoor mode */ + cmd.cmdidx = MMC_CMD_RES_MAN; + cmd.resp_type = MMC_RSP_R1b; + cmd.cmdarg = MMC_CMD62_ARG1; + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) { + debug("mmc_boot_partition_size_change: Error1 = %d\n", err); + return err; + } + + /* Boot partition changing mode */ + cmd.cmdidx = MMC_CMD_RES_MAN; + cmd.resp_type = MMC_RSP_R1b; + cmd.cmdarg = MMC_CMD62_ARG2; + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) { + debug("mmc_boot_partition_size_change: Error2 = %d\n", err); + return err; + } + /* boot partition size is multiple of 128KB */ + bootsize = (bootsize * 1024) / 128; + + /* Arg: boot partition size */ + cmd.cmdidx = MMC_CMD_RES_MAN; + cmd.resp_type = MMC_RSP_R1b; + cmd.cmdarg = bootsize; + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) { + debug("mmc_boot_partition_size_change: Error3 = %d\n", err); + return err; + } + /* RPMB partition size is multiple of 128KB */ + rpmbsize = (rpmbsize * 1024) / 128; + /* Arg: RPMB partition size */ + cmd.cmdidx = MMC_CMD_RES_MAN; + cmd.resp_type = MMC_RSP_R1b; + cmd.cmdarg = rpmbsize; + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) { + debug("mmc_boot_partition_size_change: Error4 = %d\n", err); + return err; + } + return 0; +} + +/* + * This function shall form and send the commands to open / close the + * boot partition specified by user. + * + * Input Parameters: + * ack: 0x0 - No boot acknowledge sent (default) + * 0x1 - Boot acknowledge sent during boot operation + * part_num: User selects boot data that will be sent to master + * 0x0 - Device not boot enabled (default) + * 0x1 - Boot partition 1 enabled for boot + * 0x2 - Boot partition 2 enabled for boot + * access: User selects partitions to access + * 0x0 : No access to boot partition (default) + * 0x1 : R/W boot partition 1 + * 0x2 : R/W boot partition 2 + * 0x3 : R/W Replay Protected Memory Block (RPMB) + * + * Returns 0 on success. + */ +int mmc_boot_part_access(struct mmc *mmc, u32 ack, u32 part_num, u32 access) +{ + int err; + struct mmc_cmd cmd; + + /* Boot ack enable, boot partition enable , boot partition access */ + cmd.cmdidx = MMC_CMD_SWITCH; + cmd.resp_type = MMC_RSP_R1b; + + cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (EXT_CSD_PART_CONF << 16) | + ((EXT_CSD_BOOT_ACK(ack) | + EXT_CSD_BOOT_PART_NUM(part_num) | + EXT_CSD_PARTITION_ACCESS(access)) << 8); + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) { + if (access) { + debug("mmc boot partition#%d open fail:Error1 = %d\n", + part_num, err); + } else { + debug("mmc boot partition#%d close fail:Error = %d\n", + part_num, err); + } + return err; + } + + if (access) { + /* 4bit transfer mode at booting time. */ + cmd.cmdidx = MMC_CMD_SWITCH; + cmd.resp_type = MMC_RSP_R1b; + + cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (EXT_CSD_BOOT_BUS_WIDTH << 16) | + ((1 << 0) << 8); + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) { + debug("mmc boot partition#%d open fail:Error2 = %d\n", + part_num, err); + return err; + } + } + return 0; +} +#endif diff --git a/include/mmc.h b/include/mmc.h index de6d497..ab93576 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -86,6 +86,11 @@ #define MMC_CMD_APP_CMD 55 #define MMC_CMD_SPI_READ_OCR 58 #define MMC_CMD_SPI_CRC_ON_OFF 59 +#define MMC_CMD_RES_MAN 62 + +#define MMC_CMD62_ARG1 0xefac62ec +#define MMC_CMD62_ARG2 0xcbaea7 +
#define SD_CMD_SEND_RELATIVE_ADDR 3 #define SD_CMD_SWITCH_FUNC 6 @@ -153,6 +158,7 @@ */ #define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */ #define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */ +#define EXT_CSD_BOOT_BUS_WIDTH 177 #define EXT_CSD_PART_CONF 179 /* R/W */ #define EXT_CSD_BUS_WIDTH 183 /* R/W */ #define EXT_CSD_HS_TIMING 185 /* R/W */ @@ -177,6 +183,16 @@ #define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */ #define EXT_CSD_BUS_WIDTH_8 2 /* Card is in 8 bit mode */
+#define EXT_CSD_BOOT_ACK_ENABLE (1 << 6) +#define EXT_CSD_BOOT_PARTITION_ENABLE (1 << 3) +#define EXT_CSD_PARTITION_ACCESS_ENABLE (1 << 0) +#define EXT_CSD_PARTITION_ACCESS_DISABLE (0 << 0) + +#define EXT_CSD_BOOT_ACK(x) (x << 6) +#define EXT_CSD_BOOT_PART_NUM(x) (x << 3) +#define EXT_CSD_PARTITION_ACCESS(x) (x << 0) + + #define R1_ILLEGAL_COMMAND (1 << 22) #define R1_APP_CMD (1 << 5)
@@ -201,6 +217,11 @@ #define PART_ACCESS_MASK (0x7) #define PART_SUPPORT (0x1)
+/* The number of MMC physical partitions. These consist of: + * boot partitions (2), general purpose partitions (4) in MMC v4.4. + */ +#define MMC_NUM_BOOT_PARTITION 2 + struct mmc_cid { unsigned long psn; unsigned short oid; @@ -277,6 +298,11 @@ int mmc_switch_part(int dev_num, unsigned int part_num); int mmc_getcd(struct mmc *mmc); int mmc_getwp(struct mmc *mmc); void spl_mmc_load(void) __noreturn; +/* Function to change the size of boot partition and rpmb partitions */ +int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize, + unsigned long rpmbsize); +/* Function to send commands to open/close the specified boot partition */ +int mmc_boot_part_access(struct mmc *mmc, u32 ack, u32 part_num, u32 access);
#ifdef CONFIG_GENERIC_MMC #define mmc_host_is_spi(mmc) ((mmc)->host_caps & MMC_MODE_SPI)